Doorcheck



1,534,235 F. J. MCLOUGHLIN DOORGHECK Filed March 8, 1922 2 Sheets-Sheet 1 April 21, l1925.

Aprilgl, 1925,

F. J. McLouGHLlN DooRcHEcx Filed March 8. 1922 2 Sheets-Sheet 2 vwmtoz TbaZZ 07mm "iti/nay concern? Be it'known that I, FRNCIs y Y j y i,5 34,23f5 eterea.-

rnanersa. MGLonenLrN, oir-BROOKLYN, New Yami.

.1 nooRonn'cK.

Appncanoir area' "ivrirh s, `19221. seal Inn. 541,929'.l

y J. ltlo'ionGn- 11N, ay `citizenof the UmtedlvSwttate siding in Brooklyn, j `county ot Kings,

ve1'1'ie'tfrelat i, or sA lt-closnrg 'tages o't (fthe, invention "are V,found its v'chea'p`ness, simplicity, and l'ewness 'parts wo ut et Order.y

ln` its ultimate Vanal 'isisl'he apparatus con j njie'nibeisv tened respectively to "the 'door` I edge rv'oi'ithe' doorbpening, oneot said menibers being adapted to cause revolution of the other when the door closes while the two move idly past each other on opening the door. There is no air or tluid pressure involved, the resistance to closure of the door resulting from that which is familiarly incident to the revolution ot' a screw by pressure upon its thread.

The basic principle ot the invention is capable of embodiment in a great variety of forms some of which are illustrated in the accompanying drawings wherein Figure 1 is a plan view of one form as seen from above the transom near the hinge, Figure 2 is a view of the same in elevation, Figure 3 is a plan view ot a modification, Figure/s1 is a perspective view of a portion of the form shown in Figure 3, Figure 5 is a view in elevation of another form, Figure 6 is a horizontal sectional view on the line G-G ot Figure 5, Figure 7 is a view partly in section and partly broken away of still another torni, and Figure 8 is a perspective view of a part ot the Al'orni shown in Figure 7.

ln the forni shown in Figures 1 and 2, the swinging door l() is carried on the usual hinges 11, and closes under the top bar 12 ot' the door trame, which is shown as the bottoni bar of the transom.

Under this bar 12 there is fastened plate 13, preferably inset so as not to project below the bar. This plate is furnished with inclined ratchet teeth 14 set on the arc ot a circle. Upon one face ot the door 10, a stout pin 15 carries a swinging frame 16, at the upper end ot which is revolubly Ithe invention vin which the too'tlie'd'dsectoi" mountedta w'heel17.` carrying a spiral. ridge V18 'whose' pitch corresponds to the distance between successive teeth 1l. This ridge has ajb'yeveled edge, as plainly Yshown in Figure The .traine ljisyadapted' always to tend towardv the toothed "'platek 13, yeither by gravity or by theuse ot a spring, for lin'- stance as shownat 19. "This hojl'dshthe ridge `18"ini contant with the plate 13.

l l/ Vhentthe door `is opened," the beveled e'dge bf theA ridge nieves idly over the 'teeth 14;, like"anfordinary pawlfbut when `the Ad'oolis fcflosjed, the ridge engagesfthefse teeth as showir'iilv Figure 1, and v.the wheel 1Ti`s'tre- A volved rapidly by 4the pressui l p teeth '14,' votlrerrng .the resistanceLu'sual [in such n ,l u Leases.. itself.l and' to vthe lnfjFigures 3, and l-1 .issli'owiia 'toi-it ot '13 is replaced by a straight bar 20, provided with inclined teeth on its under edge and carried by a universal joint 21 on the top of the door. Upon the door is carried a swivelled frame 22 having` slotted guides 23 through which the bar 20 passes. Be tween these guides is revolubly mounted the wheel 17 with the ridge 18, as described for Figures 1 and 2. In this form it is the bar 2O that yields when the door opens, but holds its engagement with the ridge 18 when the door closes. The resistance to revolution of the wheel 17 checks the door in this as in the irst described forni.

In the form shown in Figures 5 and 6 one member of the hinge 2l carries a toothed ratchet wheel 25, and upon the other hinge member 26 there are brackets 27 upon which a frame 28 is pivoted at 29. This frame carries a revoluble wheel 17 with the ridge 18 as before, and a spring 30, bearing on the back of the frame 28, keeps the wheel in engagement with the ratchet. The mode of operation is similar to that already described.

Figures 7 and 8 show a lorin wherein the revoluble member is carried by the door fra-me. This member is the long spiral wire 31, mounted upon a universal joint 32, of the ball and socket type, on the door frame. Upon the door 10 is mounted a socket 33 carrying a pivoted fork 34. Between the guides 34 rides a vertically movable plate 35, having a depending tooth 36. This is shaped substantially as shown, so that it will ride idly over the screw wire 31 when the door is opened, but will engage with the wire so as to cause it to revolve when the door closes. It will be noted that there is a straight portion of the wire 3l for a short interval near the door, and by reason of this the tooth 36 will be liberated a Yshort time before the door actually closes. This insures the free action of the closing spring to finally close the door.

As shown in Figure 7, the pitch of the screw may be steepened toward its base, so as to offer an increased resistance at the last', thus insuring a soft and noiseless closing of the door.

The invention may be embodied in many different forms without departing from its principle and I do not limit myself to the details shown and described.

l. A door check comprising two cooperating members mounted respectively on the door and its frame, one of said members being revoluble b v pressure of the other in one direction only and one of said members being adapted to ride idly over the other in the other direction only.

2. Apparatus as in claim 1 wherein one of the members has a tooth so inclined as to permit the other member to yield when the door is opened, said tooth being adapted to cause revolution of the other member by a sliding thrust when the door is closed.

3. Apparatus as in claim 1 wherein one member is mounted on a universal joint on the door frame and passes between guides carried by the door.

fApparatus as in claim l wherein one member is a wire helix mounted on the door frame on a universal joint.

5. Apparatus as in claim l wherein one ,member is a wire helix mounted on the door frame on a universal joint and wherein the pitch of said helix is made steeper nearer the door frame than further out.

6. Apparatus as in claim l wherein one member is a wire helix mounted on a door frame on a universal joint and wherein the coils of the helix are arranged at such a distance from the door frame that the tooth in the member carried by the door passes all the coils of the helix and ceases to engage them before the door is fully closed, thus removing the resistance and allowing the door to nish its closing motion freely and quickly to insure a tight closing.

In testimony whereof I have hereto set my hand on this 3rd day of March 1922.

FRANCIS J. MCLOUGHLIN. 

